North SELEKT BRD, Руководство по эксплуатации

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TROUBLESHOOTING
May 06, 2020 Page 16 User Manual No: OM-101A EN
Description Possible Cause Corrective Action
3. Welding wire feeding
problems A Contact tip is worn.
B Liner is worn / dirty.
C Consumables used are not suitable for the welding
wire diameter or material.
D MIG/MAG equipment not set-up properly.
E Welding wire is contaminated.
A Replace contact tip.
B Check the Liner; blow it out with clean, dry com-
pressed air. If needed replace it.
C Use recommended consumables for the welding
wire diameter/material used.
D Check the feed rolls, feed roll pressure and the
spool brake are adjusted as stated by the
MIG/MAG equipment
’s manual.
E Use a cleaning felt to clean welding wire in the
MIG/MAG equipment.
4. Wire feed stops during
welding A Wire blockage in contact tip.
B Wire burns back into contact tip
C Groove worn in contact tip by welding wire.
A Check for contamination/clogging, clean or re-
place contact tip.
B Adjust distance between contact tip and arc.
C Replace contact tip.
5. Porosity in the weld
metal A Turbulent shielding gas flowing to weld zone
caused by spatter build up inside nozzle or on gas
diffuser.
B Too low or extremely high shielding gas flow in the
Torch.
C Shielding gas supply contaminated or incorrect
shielding gas used.
D Moisture or contamination on the welding wire or
on the work piece
A Clean the Torch consumables and use nozzle /
gas diffuser anti-spatter spray.
B Check flow using a gas flow meter then adjust
gas flow rate from 10 LPM (indoors, no drafts)
up to 20 LPM (welding in drafts or outdoors).
C Check for gas leakages using soapy water or
check for correct shielding gas to the Welding
System.
D Check the wire and the work piece, use less or
different anti-spatter spray.
6. Welding arc:
- always varies length
- is unstable
- is erratic A Contact tip is worn.
B Wrong welding parameters.
C Poor electrical connections in the welding circuit.
A Change contact tip.
B Check the MIG/MAG equipment setup parameters
then change parameters.
C Check / tighten all electrical connections of the
MIG/MAG equipment, Torch and ground cable to
work piece.
7. Welding wire burns
back to contact tip A Incorrect arc voltage/ wire feed speed weld param-
eters for the welding wire wire/material/Torch posi-
tion.
B Erratic / unstable welding arc.
C Incorrect contact tip stick-out length for required
weld.
D Incorrect welding wire stick-out length for required
weld.
E Ground cable to work piece fault.
A Adjust arc voltage and/or wire feed speed param-
eters.
B Refer to Description No. 6 on page 16.
C Adjust nozzle / tip relationship.
D Adjust wire stick-out.
E Replace ground cables and/or connections.
8. Short contact tip life A Contact tip size.
B Welding wire eroding contact tip due to feed rolls
scoring wire.
C Exceeding Torch duty cycle.
A Replace with correct contact tip size.
B Change feed rolls.
C Replace with higher rated Torch.
9. Extreme spatter A Incorrect arc voltage/ wire feed speed weld param-
eters for the welding wire / material / Torch posi-
tion.
B Inadequate shielding gas coverage.
C Contaminated wire or work piece.
A Adjust arc voltage and/or wire feed speed param-
eters.
B Verify shielding gas coverage or gas mixture.
C Use a cleaning felt to clean welding wire in the
MIG/MAG equipment and work piece.